Method ChangeBackBufferFormat

samples/D3D11/src/DeviceManager.cpp:384–443

}

HRESULT
DeviceManager::ChangeBackBufferFormat(DXGI_FORMAT format, UINT sampleCount)
{
    HRESULT hr = E_FAIL;

    if((format == DXGI_FORMAT_UNKNOWN || format == m_SwapChainDesc.BufferDesc.Format) &&
       (sampleCount == 0 || sampleCount == m_SwapChainDesc.SampleDesc.Count))
        return S_FALSE;

    if(m_Device)
    {
        bool fullscreen = (GetWindowState() == kWindowFullscreen);
        if(fullscreen)
            m_SwapChain->SetFullscreenState(false, NULL);

        IDXGISwapChain* newSwapChain = NULL;
        DXGI_SWAP_CHAIN_DESC newSwapChainDesc = m_SwapChainDesc;

        if(format != DXGI_FORMAT_UNKNOWN)
            newSwapChainDesc.BufferDesc.Format = format;
        if(sampleCount != 0)
            newSwapChainDesc.SampleDesc.Count = sampleCount;

        IDXGIAdapter* pDXGIAdapter = GetDXGIAdapter();

        IDXGIFactory* pDXGIFactory = NULL;
        pDXGIAdapter->GetParent(__uuidof(IDXGIFactory), reinterpret_cast<void**>(&pDXGIFactory));

        hr = pDXGIFactory->CreateSwapChain(m_Device, &newSwapChainDesc, &newSwapChain);

        pDXGIFactory->Release();
        pDXGIAdapter->Release();
        
        if (FAILED(hr))
        {
            if(fullscreen)
                m_SwapChain->SetFullscreenState(true, NULL);

            return hr;
        }

        SAFE_RELEASE(m_BackBufferRTV);
        SAFE_RELEASE(m_SwapChain);
        SAFE_RELEASE(m_DepthStencilBuffer);
        SAFE_RELEASE(m_DepthStencilDSV);

        m_SwapChain = newSwapChain;
        m_SwapChainDesc = newSwapChainDesc;

        m_DepthStencilDesc.SampleDesc.Count = sampleCount;

        if(fullscreen)                
            m_SwapChain->SetFullscreenState(true, NULL);

        CreateRenderTargetAndDepthStencil();
        BackBufferResized();
    }